CVE-2026-90159

Summary

In the Linux kernel, the following vulnerability has been resolved:

bpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks

_bpf_setsockopt() and _bpf_getsockopt() call sock_owned_by_me() for full sockets, so these helpers expect the socket lock to be held.

BPF_CGROUP_UNIX_GETPEERNAME and BPF_CGROUP_UNIX_GETSOCKNAME run BPF programs without acquiring the socket lock. A program attached to either hook can therefore trigger the sock_owned_by_me() warning by calling bpf_setsockopt() or bpf_getsockopt().

Disallow bpf_setsockopt() and bpf_getsockopt() for CGROUP_UNIX_GETPEERNAME and CGROUP_UNIX_GETSOCKNAME.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux859051dd165ec6cc915f0f2114699021144fd249 < 61769b9c882a964af3a6ebd9a8e43615f8713234affected
LinuxLinux859051dd165ec6cc915f0f2114699021144fd249 < fe91c3f64a738dd97e8542ad5bdfbe5ac430edf6affected
LinuxLinux859051dd165ec6cc915f0f2114699021144fd249 < daeb74f5f398e847d1d42906aec6610406a34fdcaffected
LinuxLinux859051dd165ec6cc915f0f2114699021144fd249 < 84473a7e1813a2da7b759ab1d098a84998c8d3f5affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References